Page 132 - 2018_IMC

HYDRONIC PIPING

tration into the outlet is of the correct depth. For inspec- with tubing that has an ethylene vinyl alcohol copolymer
1
tion purposes, a second dimple shall be placed / inch (EVOH) oxygen barrier layer.
4
(6.4 mm) above the first dimple. Dimples shall be 1203.10 PVC plastic pipe. Joints between PVC plastic pipe
aligned with the tube run.
and fittings shall be solvent-cemented or threaded joints con-
1203.3.8.2 Brazed joints. Mechanically formed tee fit- forming to Section 1203.3.
tings shall be brazed in accordance with Section 1203.11 Steel pipe. Joints between steel pipe or fittings shall
1203.3.1. be mechanical joints that are made with an approved elasto-
1203.4 ABS plastic pipe. Joints between ABS plastic pipe or meric seal, or shall be threaded or welded joints conforming
fittings shall be solvent-cemented or threaded joints conform- to Section 1203.3.
ing to Section 1203.3. 1203.12 Steel tubing. Joints between steel tubing or fittings

1203.5 Copper or copper-alloy pipe. Joints between copper shall be mechanical or welded joints conforming to Section
or copper-alloy pipe or fittings shall be brazed, mechanical, 1203.3.
soldered, threaded or welded joints conforming to Section 1203.13 Polypropylene (PP) plastic. Joints between PP
1203.3. plastic pipe and fittings shall comply with Sections 1203.13.1
and 1203.13.2.
1203.6 Copper or copper-alloy tubing. Joints between cop-
per or copper-alloy tubing or fittings shall be brazed, mechan- 1203.13.1 Heat-fusion joints. Heat-fusion joints for poly-
ical or soldered joints conforming to Section 1203.3, flared propylene (PP) pipe and tubing joints shall be installed
joints conforming to Section 1203.6.1, push-fit joints con- with socket-type heat-fused polypropylene fittings, elec-
forming to Section 1203.6.2 or press-connect joints conform- tro-fusion polypropylene fittings or by butt fusion. Joint
ing to Section 1203.6.3. surfaces shall be clean and free from moisture. The joint
shall be undisturbed until cool. Joints shall be made in
1203.6.1 Flared joints. Flared joints shall be made by a
tool designed for that operation. accordance with ASTM F2389.
1203.13.2 Mechanical and compression sleeve joints.
1203.6.2 Push-fit joints. Push-fit joints shall be installed Mechanical and compression sleeve joints shall be
in accordance with the manufacturer’s instructions.
installed in accordance with the manufacturer’s instruc-
1203.6.3 Press-connect joints. Press-connect joints shall tions.
be installed in accordance with the manufacturer’s instruc- 1203.14 Raised temperature polyethylene (PE-RT) plastic
tions.
tubing. Joints between raised temperature polyethylene tub-
1203.7 CPVC plastic pipe. Joints between CPVC plastic ing and fittings shall conform to Sections 1203.14.1 through
pipe or fittings shall be solvent-cemented or threaded joints 1203.14.3. Mechanical joints shall conform to Section
conforming to Section 1203.3. 1203.3.
1203.8 Polybutylene plastic pipe and tubing. Joints 1203.14.1 Compression-type fittings. Where compres-
between polybutylene plastic pipe and tubing or fittings shall sion-type fittings include inserts and ferrules or O-rings,
be mechanical joints conforming to Section 1203.3 or heat- the fittings shall be installed without omitting the inserts
fusion joints conforming to Section 1203.8.1. and ferrules or O-rings.
1203.8.1 Heat-fusion joints. Joints shall be of the socket- 1203.14.2 PE-RT-to-metal connections. Solder joints in
fusion or butt-fusion type. Joint surfaces shall be clean and a metal pipe shall not occur within 18 inches (457 mm) of
free of moisture. Joint surfaces shall be heated to melt a transition from such metal pipe to PE-RT pipe.
temperatures and joined. The joint shall be undisturbed
1203.14.3 Push-fit joints. Push-fit joints that create a seal
until cool. Joints shall be made in accordance with ASTM on the outside diameter of the tubing shall not be used
D3309. with tubing that has an ethylene vinyl alcohol copolymer
1203.9 Cross-linked polyethylene (PEX) plastic tubing. (EVOH) oxygen barrier layer.
Joints between cross-linked polyethylene plastic tubing and 1203.15 Polyethylene/aluminum/polyethylene (PE-AL-
fittings shall conform to Sections 1203.9.1 through 1203.9.3. PE) pressure pipe. Joints between polyethylene/aluminum/
Mechanical joints shall conform to Section 1203.3.
polyethylene pressure pipe and fittings shall conform to Sec-
1203.9.1 Compression-type fittings. Where compres- tions 1203.15.1 and 1203.15.2. Mechanical joints shall com-
sion-type fittings include inserts and ferrules or O-rings, ply with Section 1203.3.
the fittings shall be installed without omitting the inserts
1203.15.1 Compression-type fittings. Where compres-
and ferrules or O-rings.
sion-type fittings include inserts and ferrules or O-rings,
1203.9.2 Plastic-to-metal connections. Soldering on the the fittings shall be installed without omitting the inserts
metal portion of the system shall be performed not less and ferrules or O-rings.
than 18 inches (457 mm) from a plastic-to-metal adapter in
1203.15.2 PE-AL-PE-to-metal connections. Solder
the same water line.
joints in a metal pipe shall not occur within 18 inches (457
1203.9.3 Push-fit joints. Push-fit joints that create a seal mm) of a transition from such metal pipe to PE-AL-PE
on the outside diameter of the tubing shall not be used pipe.

2018 INTERNATIONAL MECHANICAL CODE  115
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